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SecurityPkg: Fix assert when setting key from eMMC/SD/USB 

When secure boot is enabled, if one loads keys from a FAT formatted
eMMC/SD/USB when trying to provision PK/KEK/DB keys via the menu,
an assert in StrLen() occurs.
This is because the filename starts on odd address, which is not a uint16
aligned boundary: https://bugzilla.tianocore.org/show_bug.cgi?id=1003

There are further known issues with the OpenFileByDevicePath() function;
those are tracked by
<https://bugzilla.tianocore.org/show_bug.cgi?id=1008>.

Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Vladimir Olovyannikov <vladimir.olovyannikov@broadcom.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Roman Bacik <roman.bacik@broadcom.com>
Reviewed-by: "Yao, Jiewen" <jiewen.yao@intel.com>
[lersek@redhat.com: whitespace fixes]
[lersek@redhat.com: reference TianoCore BZ#1008]
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Roman Bacik 2018-07-10 15:51:05 -07:00 committed by Laszlo Ersek
parent 0a563f3fec
commit 79b10d4ce4
1 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigFileExplorer.c
View File

@ -123,6 +123,8 @@ OpenFileByDevicePath(
EFI_FILE_PROTOCOL *Handle1;
EFI_FILE_PROTOCOL *Handle2;
EFI_HANDLE DeviceHandle;
CHAR16 *PathName;
UINTN PathLength;
if ((FilePath == NULL || FileHandle == NULL)) {
return EFI_INVALID_PARAMETER;
@ -173,6 +175,11 @@ OpenFileByDevicePath(
//
Handle2 = Handle1;
Handle1 = NULL;
PathLength = DevicePathNodeLength (*FilePath) - sizeof (EFI_DEVICE_PATH_PROTOCOL);
PathName = AllocateCopyPool (PathLength, ((FILEPATH_DEVICE_PATH*)*FilePath)->PathName);
if (PathName == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Try to test opening an existing file
@ -180,7 +187,7 @@ OpenFileByDevicePath(
Status = Handle2->Open (
Handle2,
&Handle1,
((FILEPATH_DEVICE_PATH*)*FilePath)->PathName,
PathName,
OpenMode &~EFI_FILE_MODE_CREATE,
0
);
@ -192,7 +199,7 @@ OpenFileByDevicePath(
Status = Handle2->Open (
Handle2,
&Handle1,
((FILEPATH_DEVICE_PATH*)*FilePath)->PathName,
PathName,
OpenMode,
Attributes
);
@ -202,6 +209,8 @@ OpenFileByDevicePath(
//
Handle2->Close (Handle2);
FreePool (PathName);
if (EFI_ERROR(Status)) {
return (Status);
}